Williams played basketball for University Prep Charter School for Young Men in Rochester, New York.

[2] He competed for the City Rocks on the Amateur Athletic Union circuit alongside Isaiah Stewart and Buddy Boeheim.

[3] A four-star recruit, Williams committed to playing college basketball for Buffalo over offers from Syracuse, Virginia, Pittsburgh, Temple and St.

[6] As a junior, he averaged 17.6 points, 6.8 rebounds and 2.4 assists per game, earning Second Team All-Mid-American Conference (MAC) honors.

[7][8] In his senior season debut on November 10, 2021, he scored a career-high 32 points and grabbed eight rebounds in an 88–76 loss to sixth-ranked Michigan.